A second thing came to mind, that seems a tad easy to do compared to other music games: homebrew that allows the user to load a MIDI, and press buttons in order to play the associated instruments (similar to Daigasso! Band Brothers). Aside from possibly all the instruments needed to be placed on the Wii, is something like this really so hard to do? I haven't even seen something like it on the PC >.>

And another homebrew idea is.
This one needs two wiimote controllers. A drum playing application where you play the drums shaking the wiimotes. IR detection can be used so that you can control 4-8 pieces of drumkit parts. And if you put the balance board into the thing it would be awesome

One drawback though, I guess currently there is only one wiimote support in the homebrew apis.

And another homebrew idea is.
This one needs two wiimote controllers. A drum playing application where you play the drums shaking the wiimotes. IR detection can be used so that you can control 4-8 pieces of drumkit parts. And if you put the balance board into the thing it would be awesome

One drawback though, I guess currently there is only one wiimote support in the homebrew apis.